Mechanical and numerical modelling of fluid-structure vibration instabilities of liquid propelled launch vehicle

Ohayon, Roger; Morand, Henri

doi:10.1016/0960-0779(94)00172-m

Cited by 27 publications

(2 citation statements)

References 10 publications

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“…The two boundary value problems expressed in terms of p or in terms of 𝜑 are well posed in the static case (𝜔 = 0). They have been used, with further transformation, leading to appropriate so-called (u, p,𝜑) symmetric formulations with mass coupling (leading to a final (u,𝜑) formulation, as described by Ohayon and Morand (1995), Chapter 8 or with stiffness coupling, by Sandberg and Goransson (1988).…”

Section: Equationsintermsofp or 𝝋 And U ⋅ Nmentioning

confidence: 99%

Encyclopedia of Computational Mechanics

Ohayon¹,

Schotté

2004

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Section: Equationsintermsofp or 𝝋 And U ⋅ Nmentioning

confidence: 99%

Encyclopedia of Computational Mechanics

Ohayon¹,

Schotté

2004

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“…First, the presence of a free surface in partially filled fluid tanks engenders relative fluid motions to the tank. This phenomenon, referred to as 'fluid sloshing' [5,6], is generally caused by external tank excitation, and may have a significant influence on the response of the tank. Currently, for enhancing the transport ability of space, the ratio of propellant weight to gross liftoff weight almost is up to 90%, thus a rather large perturbation force, moment and impact action introduced by the sloshing of a mass of propellant will exceed the regulating capacity of control system or the bearing capacity of structures.…”

Section: Introductionmentioning

confidence: 99%

Vibration-based Damage Detection to the Composite Tank Filled with Fluid

Zhou

Mevel

2010

Structural Health Monitoring

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Demand of composite fuel tank for space vehicles keeps increasing globally in the aerospace industry, and requires of a mean to detect the structural damage or predict its service life. As important and valid tools, in the past years, lots of nondestructive evaluation techniques have been developed, and they are carried out according to a regular time schedule. The structure has to be taken out of service during each inspection, causing serious financial implications for the user. That is why much research effort is now focused on real-time monitoring techniques. Optical grating fiber attracts more and more attention due to its excellent sensing and mechanical performances and ability of monitoring online. But it still can only measure the local deformation, but not the damage that is far away from the location of optical fiber sensors. Statistical model-based vibration-based monitoring methods have proved to be useful for the detection and localization of structural damages which might occur far from the location of the sensors. An experimental investigation on the modal properties and dynamic response of composite fuel tank filled with fluid under external excitation in the transverse direction are reported, and a vibration signal, which was obtained when the composite fuel tank filled with water was under impulsion until it failed. Proposed in this study is a method to detect the damage of the composite fuel tank with the scarce gradual damaged vibration signal. The experiment setup is also described in detail with inclusion of modeling a damaged situation of a structure. The damage detection algorithm is developed by applying a residually generated form of a subspace-based covariance-driven identification method and the vibration signal analysis. Results of the modal identification and the damage detection are reported in this article.

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Fluid‐Structure Interaction Problems

Ohayon¹

2004

Encyclopedia of Computational Mechanics

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Several so‐called reduced order formulations are reviewed in the case of linear vibration analysis of bounded fluid‐structure systems for low modal density situations. Compressibility effects in the fluid for interior structural‐acoustic problems, and free‐surface gravity effects, as well as for hydroelastic‐sloshing interaction problems in the case of incompressible liquids, are examined. Reduced order models leading to symmetric matrix systems are then described using static well‐posed behavior of the irrotational fluid. In this respect, the fluid‐structure boundary value local equations, expressed in terms of fluid scalar field variables for the fluid (and displacement variables for the structure), are regularized for zero‐frequency limit.

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Mechanical and numerical modelling of fluid-structure vibration instabilities of liquid propelled launch vehicle

Cited by 27 publications

References 10 publications

Encyclopedia of Computational Mechanics

Encyclopedia of Computational Mechanics

Vibration-based Damage Detection to the Composite Tank Filled with Fluid

Fluid‐Structure Interaction Problems

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